Flagging Indicator

Bi female here. I’ve been seeing an ENM M/F couple for almost four months. The F was an acquaintance of mine for about two years. We are all close in age (late thirties, early forties). This is my first ethically non-monogamous relationship.Here are the pros: they are charming and attractive; the sex is great; they are affectionate with me in public and introduce me to their friends as someone they are dating; they invite me to sleepover at their place, they cook for me, and show other ac